Adsorption of anionic azo dye from aqueous wastewater using zeolite NaX as an efficient adsorbents

• Published in: Desalination and water treatment Vol. 306; pp. 245 - 252
• Main Authors: Khudhur, Rasha H., Ali, Nisreen S., Khader, Eman H., Abbood, Noor S., Salih, Issam K., Albayati, Talib M.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01-09-2023
• Subjects: Adsorption; Adsorption kinetics; Azo dye; Batch adsorption; Isotherms; Wastewater treatment; Water pollution; Water remediation; Zeolite NaX; Water remediation; Adsorption; Isotherms; Azo dye; Batch adsorption; Adsorption kinetics; Water pollution; Zeolite NaX; Wastewater treatment
• ISSN: 1944-3986
• DOI: 10.5004/dwt.2023.29861

In this investigation, batch adsorption was utilized to get rid of the anionic azo dye from an aqueous solution. Adsorbents based on zeolite NaX were used. The results showed that zeolite NaX adsorbents achieved greater removal efficiency with values of 72.34%. According to the findings, with R2 = 0.9958, adsorption model using the Langmuir isotherm showed a greater correlation coefficient. When the Freundlich, Temkin, and Langmuir isotherm adsorption models were assessed. According to type Langmuir isotherm adsorption, 0.42187 mg/g was established as the maximal absorption of azo dye. The Langmuir isotherm model’s equilibrium parameter (RL) values showed that all RL values were between 0 and 1, demonstrating the favorability of the Langmuir isotherm. Pseudo-first-order and pseudo-second-order models were used to examine adsorption kinetics. It was discovered that the pseudo-first-order kinetics of the zeolite NaX adsorption rates were supported, with R2 values of 0.9894 for the high connection. The outcomes demonstrated zeolite NaX’s moderate dye removal efficiency.